Mounting of the platen-roller in type-writing machines.



I No. 329.929. PATENTBD AUG. 28, 1906.

0. J. MOHNS.

MOUNTING 01 THE PLATEN ROLLER IN TYPE WRITING MACHINES.

' APPLICATION FILED mam, 1904.

2 SHEETS-SHEET 1.

.9 '4 f E 2 a y x y y Zflazeases mz/ewr @zZJMuKZZflS No. 829,929. PATENTED AUG. 28, 1906.

c. J. MOHNS. 1

MOUNTING OF THE PLATBN ROLLER INTYPE WRITING MACHINES.

APPLICATION FILED AUG. 11 1904.

2 SHEETS-SHEET 2.

Matrzayaas war /tar UNITED STATES PATENT OFFICE..

CARL JULIUS MOHNS, OF CHEMNITZ, GERMANY, ASSIGNOR TO THE FIRM OF l/VANDEREI} FAHRRADVVERKE VORM. \VINKLHOFER & JAENICKE A. (in, OF SCHONAU, NEAR GHEMNITZ, SAXONY, GERMANY.

MOUNTING OF THE PLATEbl-ROLLER IN TYPE-WRITING MACHINES.

Patented Aug. 28, 1 906.

Application filed August 11, 1904. Serial No. 220.402.

2'0 aZZ whom it may concern:

Be it known that I, CARL JULIUS MonNs, of (Jhemnitz, Germany, have invented certain new and useful Im rovernents Relating to the Mounting of the P aten-Roller in Typel/Vriti'rr Machines, of which the following is a speci ication.

This invention relates to type-Writing machines Where the platen-roller is moved vertically from a lower to an upper position, or vice versa, in order to receive upon the paper thereon the impression of the respective characters of two sets of type.

The object of the invention is to provide means whereby such upper and lower positions of the platen may be accurately and easily adjusted or set at any time to insure effective and uniform printing and true alinc- Inent. This. is attained by mounting the bearings of the platen-roller in vertical guiding-slots which are closed at the upper and lower ends and fitted at such ends with setscrews or the like, which limit the movements of the bearings and can be easily adjusted at any time.

Referring to the accompanying drawings, Figure 1 is a sectional view with parts of the left bearing broken away. Figs. 2 and 3 are respectively an end view and plan, partly in section, of a paper-carriage arranged according to the invention Figs. 4 and 5 are detail views.

In carrying out the invention according to one modification the spindle Z of the platenrollcr A is journaled in bearings c of the platen-frame D, such bearings being adapted to slide vertically in slots in the paper-carriage E. These slots are closed at the to and bottom ends, which are fitted with setscrews f f, having lock-nuts g g. To facilitate insertion of the frame D in the papercarriage, the bearings c are preferably secured to the frame by screws (1.

In the lower position of the frame D and latenrolle r A the bearings 0 rest on the fbivcr set-screwsf, while when the frame and platen are raised vertically, as indicated by the arrow, the bearings c strike against the upper set-screws f. The arrangement and easy accessibility of the set-screws thus afford when assembling or at any time a very simple, rapid, and accurate setting of the platen-roller, and therefore enable neat printing and accurate alinement to be maintained. To place the. platen A and its frames D in position in the frame E, it is sim 1y necessary to remove one of the bearings c y taking out the screws (1, then placing the other bearing in its proper slot in the frame E and bringing the op ositc frame D flush with the opposite slot, pacing the detached bearing 0 in said slot and against the frame D, and finally screwing the bearing to its frame D.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is- The combination in a type-Writer, of a carriage having vertical slots at each end there of, bearing-blocks movable in said slots, setscrcws at each end of the slot for regulating the movement of the blocks, a platen-frame removably secured to the blocks, and a platen .having 1ts axlc bearing in. sald frame and the blocks, substantially as described.

In with css whereof I have hereunto set my hand in prosenccof two wltnessesi 'TARL JULIUS MOHNS.

Witnesses:

FRIEDRICH Sonnonrnn, ERNST O. MEYER. 

